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Finding the Fourth Proportional to 750.53, 1,125.13 and 404.05

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Solution

The fourth proportional to 750.53, 1,125.13 and 404.05 is: 605.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.53 : 1,125.13 = 404.05 : x
  2. Step 2: Convert to fraction form
    750.53/1,125.13 = 404.05/x
  3. Step 3: Cross multiply
    750.53x = 1,125.13 × 404.05
  4. Step 4: Simplify right side
    750.53x = 454,608.78
  5. Step 5: Solve for x
    x = 454,608.78/750.53
  6. Step 6: Final answer
    x = 605.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.